題目：

nc ctf.acdxvfsvd.net 1926

Try not to be naive

TIPS:

gets，棧溢出

https://pan.baidu.com/s/1nuZXEL7

提取密碼：dwvg

題解：

工具：

checksec

IDA Pro

下載

解壓

test.c

#include <stdio.h>struct Student {char name[8];int birth; };int main(void) {setbuf(stdin, 0);setbuf(stdout, 0);setbuf(stderr, 0);struct Student student;printf("What\'s Your Birth?\n");scanf("%d", &student.birth);while (getchar() != '\n') ;if (student.birth == 1926) {printf("You Cannot Born In 1926!\n");return 0;}printf("What\'s Your Name?\n");gets(student.name);printf("You Are Born In %d\n", student.birth);if (student.birth == 1926) {printf("You Shall Have Flag.\n");system("cat flag");} else {printf("You Are Naive.\n");printf("You Speed One Second Here.\n");}return 0; }

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